Hello, welcome to HCM.
All I can say is that there is no such connection between weight loss
and vitamin D levels. Vitamin D is important for the body to help in absorption of calcium, however, it does not aid in weight loss. Weight loss can be achieved by reducing the calorie and fat intake and increasing the protein, fiber, minerals and Vitamin intake along with sufficient fluids. However, its always good to have an exposure to sulight often for the body to get sufficient Vit D levels for proper body functions.
All the best!!!